Measles Cases Surge to 1,842 in U.S. in 2026; Vaccination Coverage Continues Decline
The U.S. has recorded 1,842 confirmed measles cases by May 7, 2026, coinciding with declining vaccination rates among kindergarteners. Vaccination coverage fell from 95.2% in 2019–2020 to 92.5% in 2024–2025, leaving approximately 286,000 kindergarteners at risk.
Measles Outbreak Status
Current Numbers: As of May 7, 2026, the CDC confirmed 1,842 measles cases in the United States for the year.
Vaccination Coverage Crisis
- Decline: MMR vaccination coverage among U.S. kindergarteners dropped from 95.2% (2019–2020) to 92.5% (2024–2025)
- At-risk population: Approximately 286,000 unvaccinated or undervaccinated kindergarteners lack protection
- Herd immunity threshold: Community immunity requires >95% vaccination coverage to protect vulnerable populations
Geographic Variations
While some states maintain high vaccination rates, pockets of unvaccinated individuals exist even in high-coverage areas, allowing localized outbreaks.
Vaccine Safety
The MMR vaccine remains very safe and effective. When community vaccination exceeds 95%, most people are protected through herd immunity, preventing disease spread.
Public Health Concern
The decline in vaccination coverage represents a critical public health challenge, with measles remaining highly contagious and preventable through immunization.